Imunoexpressão de CXCL12, BCL-2 e MMP-9: Sua relevância no comportamento biológico de neoplasias de glândulas salivares

Abstract

Introduction: Proinflammatory cytokines or chemokines are important regulators of cell trafficking and adhesions. The chemokine CXCL12 (C-X-C motif chemokine ligand 12) binds primarily to CXCR4 receptor, regulating intracellular signals, through several ways, related to important events in tumorigenesis as chemotaxis, cell survival, angiogenesis, proliferation, invasion and metastasis. There are insuficient informations in scientific literature about the CXCL12 in relation to survival or apoptotic markers (Bcl-2) and invasion/metastasis (MMP-9) in tumor cells of salivary gland neoplasm. Methods: In 30 pleomorphic adenomas (PA) and 30 mucoepidermoid carcinomas (MCE) were collected clinical and pathological data and analyzed in relation to the immunohistochemical expression, through the estreptovidin-biotin peroxidase method, of CXCL12, Bcl-2 and MMP-9 antibodies. Results: it was observed higher expression of CXCL12 in MCE than in PA (p = 0.001), while in PA there has been greater expression of Bcl-2 (p = 0.031). The MMP-9 was negative in most cases of the sample. Conclusion: it was concluded that the CXCL12 is not associated with the Bcl-2 and MMP-9 expression. The chemokine can be related to pathogenesis of mucoepidermoid carcinomas, whereas the Bcl-2 can be related to tumoral pathogenesis of pleomorphic adenomas. MMP-9 does not appear to play a role in the pathogenesis of the sample.